The sintered mesh fiber felt produced by our company is made of extremely fine steel fiber (micron grade) by sintering in high temperature after special non-woven matching and laying.With the pore gradient formed by layers of different pore sizes,the stainless steel sintered fiber felt can achieve higher rating and larger holding capacity,and larger filter area,and can keep the filtering working continuously. https://www.nayushiye.com/products/well-screen-and-steel-casing/pipe--based--sand--control--screen.html